From 2008, Scott Pelley's profile of American entrepreneur Greg Carr, who is using his great wealth to try to help some of the poorest people in Africa by attracting more tourists to their neighborhood -- the beautiful national park of Gorongosa in Mozambique.
The annual migration of monarch butterflies is one of science's great mysteries: millions of monarchs know the correct path even though they have never made the long journey themselves. As 60 Minutes found, the expedition to watch the migration can be its own challenge.
